Material adapted for bearings, and bearings thereof



Patented Feb. 10, .1 1

UNITED STATES CHARLES E. N OFTZGER, OF CHICAGO, ILLINOIS MATERIAL ADAPTED FOR BEARINGS, AND IBEAIlIiN'GS THEREQF No Drawing.

This invention relates to an improved hearing or a material which is peculiarly adapted for use in bearings and is useful in certain other relations, and to the method-of making 6 the same.

In the manufacture of bearings of this new composition I employ a mineral which is, so far as I am aware found onlynear Buck ye.

Arizona. It, however, may be generally do- 10 scribed as being of a- ,cru'mpled or closely folded sericite schist consisting of aggregates of small scales of the sericite, many of which overlap. and whichcan be easily ground or crushed and containing approximately 45% silicon dioxide, 40% aluminum oxide, 8% potasslum oxide, 2% calclum oxide, 1% sodium oxide, magnesium oxide and 3%% moisture.w These proportions arestated as appgoximate as they vary somewhat in differ- ?Q Ke t' specimens.

7 By the wordssericite schist as used in -thlS speclficatlon and in the clalms I contemplate this mineral found near Buckeye, Arizona, or its equivalent. This material I grind, crush or otherwise reduce to a powdered or pulverulent condition and mix with a suitable hinder, the binder varying considerably according to the uses *for which the bearing is intended; that is, whether it is for heavy work or for h gh speed work. 7

One method. and the method I claim herein. of manufacturing my improved bearings and bearing material is as follows:

Thesericite schist is ground or crushed and mixed with a comminuted partial reaction product of phenol and formaldehyde in the proportions of about 60% of the powdered mineral to 40% of such reaction product, the mixture being very thorough.

The mixture is then molded under pressure and subjected to heat which transforms the phenol-formaldehyde product into a fixed" -or insoluble infusible condensation product.

The result is a bearing which is capable of withstanding heavy loads and is of very high antifriction qualities. The proportions may be varied but they are such that the bearing is characterized bythe bearing and lubricat- 7 ing qualities of the mineral.

taneously heated and subjected to high pres- Applieation filed February 14, 1927. Serial No. 168,231.

My improved bearings also are well adapted to Withstand alkali and other solutions which are detrimental to; certain commonly used mineral bearings.

Other binders have been used with this particular mineral with satisfactory" results, among such materials being a mixture of litharge and glycerin and the ground min-' Y eral, about 35 parts of the 'litl1a1'ge.andglycerin with parts of ground mineral in bulk, the mixture being subjected to simultaneousheat and pressure. Gum arabic and castor oil in equalparts with a mixture of about four times in bulk of ground mineral, simul- 1 sure is highly satisfactory in high speed bearings. l

My improved'bearings have very excellent wearing and antifriction qualities, do not require lubricant and are adapted for various 359s, both high speed and .liezWypressure uty. f Having thus described my invention what I claim as new and desire to secure by Letters Patent is: ,7 1. A bearing comprising .a pulverulent sericite schist comprising approximately 95% of v I oxides, and an infusible'phenolic'condensa tion product in the proportions of approxi-- mately 60% to of the pulverulent seri cite schist and- 20% to 40% ofthe phenolic condensation product. v v i 2. A bearing comprising ground sericite 3 schist and an insoluble condensation product of phenolic body andformaldehyde.-

3. A bearing comprising sericite schist comprising approximately of earthy oxides, and a binder, in such proportions thatthe binder is characterized by the wearing and lubricating qualities of the mineral. v o

4. A bearing comprising a powdered serij cite schist containing approximately-95% of oxides, and a binder, in the proportions of 5 approximately 60% to 80% of the powdered sericite schist and 20% to 40% of thebinder.

5. An article of manufacture consisting of pulverulentsericite schist, and 'a binder, in,

the proportions of 60% to 80% of the serieite schist and 20% to 40% of, the binder.

6. Anew article of manufacture consisting of ground sericite schist, and an insoluble condensation product of phenolic body and formaldehyde.

7. A bearing comprising pulverulent sericite schist incorporated with an insoluble binder in such proportions that the bearing is characterized by the wearing and lubricating qualities of the mineral.

8. A new article of manufacture comprising a pulverized sericite schist, and an insoluble infusible binder, the mineral being intimately mixed or incorporated with the.

binding material.

9. A composition of matter comprising pulverulent sericite schist and an infusible condensation product in the proportions of approximately of the pulverulent sericite schist and 40% of the phenolic condensation product.

10. A composition of matter comprising a pulverulent sericite schist and an insoluble condensation product of phenolic body and formaldehyde characterized by antifriction or lubricating qualities, resistance to moisture, heat and acids.

In witness whereof I have hereunto set my hand.

CHARLES 'F. NOFTZGER. 

